【Bluetooth 5.1 Dongle 】: With the latest Bluetooth 5.1 + EDR, Transmission distance ( 328ft/100M. ), faster data rate ( 3Mbps), and lower power consumption; Backward compatible with Bluetooth 5.0/4.2/4.1/4.0/2.1/2.0 Dual-mode Bluetooth transfer, compatible Full-speed USB 2.0/USB 1.1 interface. | 【Bluetooth 5.1 Adapter for PC】: Help your old desktop add wireless Bluetooth function to connect more Bluetooth devices such as: mouse, keyboard, headphones, headset,speaker, printer, etc. ( Not compatible with Mac, car stereo or TVs.) | 【Long Range Wireless Transfer】: This USB Bluetooth dongle with 2dBi external antenna, long range wireless transfer can up to 328ft/100M. ( Note: Operation range can be affected by physical obstructions and wireless interference.) | Install Driver Tips : First install the driver, then plug this usb Bluetooth adapter into your PC. ( NOTE: You can download the driver in CD disc / Please contact us to get the online download driver site via amazon message, thanks ) | 【Lifetime Warranty】: We can offer lifetime manufacturer replacement warranty and 90 days no questions asked return policy.( If have any question, please contact us via amazon message ) | 【 Work with Multi-Device】: This usb Bluetooth dongle can make your computer for working with many devices at the same time.The anti-interference ability has been increased, new technologies have been adopted to reduce the loss of transmission efficiency caused by interference in the 2.4 GHz band.